/usr/share/pyshared/socketio/packet.py is in python-socketio 0.3.6-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | from socketio.defaultjson import default_json_dumps, default_json_loads
MSG_TYPES = {
'disconnect': 0,
'connect': 1,
'heartbeat': 2,
'message': 3,
'json': 4,
'event': 5,
'ack': 6,
'error': 7,
'noop': 8,
}
MSG_VALUES = dict((v, k) for k, v in MSG_TYPES.iteritems())
ERROR_REASONS = {
'transport not supported': 0,
'client not handshaken': 1,
'unauthorized': 2
}
REASONS_VALUES = dict((v, k) for k, v in ERROR_REASONS.iteritems())
ERROR_ADVICES = {
'reconnect': 0,
}
ADVICES_VALUES = dict((v, k) for k, v in ERROR_ADVICES.iteritems())
socketio_packet_attributes = ['type', 'name', 'data', 'endpoint', 'args',
'ackId', 'reason', 'advice', 'qs', 'id']
def encode(data, json_dumps=default_json_dumps):
"""
Encode an attribute dict into a byte string.
"""
payload = ''
msg = str(MSG_TYPES[data['type']])
if msg in ['0', '1']:
# '1::' [path] [query]
msg += '::' + data['endpoint']
if 'qs' in data and data['qs'] != '':
msg += ':' + data['qs']
elif msg == '2':
# heartbeat
msg += '::'
elif msg in ['3', '4', '5']:
# '3:' [id ('+')] ':' [endpoint] ':' [data]
# '4:' [id ('+')] ':' [endpoint] ':' [json]
# '5:' [id ('+')] ':' [endpoint] ':' [json encoded event]
# The message id is an incremental integer, required for ACKs.
# If the message id is followed by a +, the ACK is not handled by
# socket.io, but by the user instead.
if msg == '3':
payload = data['data']
if msg == '4':
payload = json_dumps(data['data'])
if msg == '5':
d = {}
d['name'] = data['name']
if 'args' in data and data['args'] != []:
d['args'] = data['args']
payload = json_dumps(d)
if 'id' in data:
msg += ':' + str(data['id'])
if data['ack'] == 'data':
msg += '+'
msg += ':'
else:
msg += '::'
if 'endpoint' not in data:
data['endpoint'] = ''
if payload != '':
msg += data['endpoint'] + ':' + payload
else:
msg += data['endpoint']
elif msg == '6':
# '6:::' [id] '+' [data]
msg += '::' + data.get('endpoint', '') + ':' + str(data['ackId'])
if 'args' in data and data['args'] != []:
msg += '+' + json_dumps(data['args'])
elif msg == '7':
# '7::' [endpoint] ':' [reason] '+' [advice]
msg += ':::'
if 'reason' in data and data['reason'] != '':
msg += str(ERROR_REASONS[data['reason']])
if 'advice' in data and data['advice'] != '':
msg += '+' + str(ERROR_ADVICES[data['advice']])
msg += data['endpoint']
# NoOp, used to close a poll after the polling duration time
elif msg == '8':
msg += '::'
return msg
def decode(rawstr, json_loads=default_json_loads):
"""
Decode a rawstr packet arriving from the socket into a dict.
"""
decoded_msg = {}
split_data = rawstr.split(":", 3)
msg_type = split_data[0]
msg_id = split_data[1]
endpoint = split_data[2]
data = ''
if msg_id != '':
if "+" in msg_id:
msg_id = msg_id.split('+')[0]
decoded_msg['id'] = int(msg_id)
decoded_msg['ack'] = 'data'
else:
decoded_msg['id'] = int(msg_id)
decoded_msg['ack'] = True
# common to every message
msg_type_id = int(msg_type)
if msg_type_id in MSG_VALUES:
decoded_msg['type'] = MSG_VALUES[int(msg_type)]
else:
raise Exception("Unknown message type: %s" % msg_type)
decoded_msg['endpoint'] = endpoint
if len(split_data) > 3:
data = split_data[3]
if msg_type == "0": # disconnect
pass
elif msg_type == "1": # connect
decoded_msg['qs'] = data
elif msg_type == "2": # heartbeat
pass
elif msg_type == "3": # message
decoded_msg['data'] = data
elif msg_type == "4": # json msg
decoded_msg['data'] = json_loads(data)
elif msg_type == "5": # event
try:
data = json_loads(data)
except ValueError, e:
print("Invalid JSON event message", data)
decoded_msg['args'] = []
else:
decoded_msg['name'] = data.pop('name')
if 'args' in data:
decoded_msg['args'] = data['args']
else:
decoded_msg['args'] = []
elif msg_type == "6": # ack
if '+' in data:
ackId, data = data.split('+')
decoded_msg['ackId'] = int(ackId)
decoded_msg['args'] = json_loads(data)
else:
decoded_msg['ackId'] = int(data)
decoded_msg['args'] = []
elif msg_type == "7": # error
if '+' in data:
reason, advice = data.split('+')
decoded_msg['reason'] = REASONS_VALUES[int(reason)]
decoded_msg['advice'] = ADVICES_VALUES[int(advice)]
else:
decoded_msg['advice'] = ''
if data != '':
decoded_msg['reason'] = REASONS_VALUES[int(data)]
else:
decoded_msg['reason'] = ''
elif msg_type == "8": # noop
pass
return decoded_msg
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